Ventilated Floors: Ventilated Timber Floors

Cover the ground with plastic foil or insulation to reduce the amount of moisture underneath. Insulate the foundation from both sides. Install frost insulation in ground around the house to keep the whole structure from freezing.

The structure of ventilated floors is very similar to wall construction.

Floor covering

Floor board

Vapour barrier, plastic foil

Supporting structure: Timber joists / PAROC eXtra

Wind protection insulation: PAROC WPS 3n

Support for wind protection insulation

Frost insulation for foundation: PAROC GRS 30

Ventilated space

Insulation solution with U value

PAROC eXtra (floor joists)

175 mm

100 mm

100 mm

125 mm

175 mm

PAROC eXtra (floor joists)

100 mm

150 mm

175 mm

200 mm

PAROC WPS 3n

55 mm

55 mm

55 mm

55 mm

55 mm

U value, W/m2K

0.17

0.15

0.13

0.11

0.09

Passive house structures

Ventilated floor can also be used in passive building.

Floor covering

Flooring boards

Vapour barrier (tape all joints)

I-Joist / PAROC eXtra (d1)

PAROC WPS 3n (d2)

Ventilated space

PAROC GRS (on the exterior side of foundation)

Frost insulation (XPS / EPS )

Block of flats

Recommended U value

W/m2K

0.08 - 0.10

d1

mm

350 - 450

d2

mm

50

Total insulation thickness

mm

400 - 500

Notes
According to the definition of a passive house provided by the Passive House Institute, the annual heating, cooling and primary energy demand should not exceed certain values. Although good thermal insulation plays a major role in achieving the Passive House standard, it alone cannot ensure compliance. The requirements for other building components and devices can be determined by various calculations tools, such as the Passive House Planning Package (PHPP), available at www.passiv.de.

Paroc is one of Europe’s leading manufacturers of energy-efficient and fire-proof insulation solutions for new and renovated buildings, marine and offshore, acoustics and other industrial applications. Throughout our 80-year history, we have built a reputation for innovation, product performance, technical expertise and sustainability. Our aim is to remain an innovative and trusted partner for a sustainable built environment.

We employ around 1840 people in our production plants in Finland, Sweden, Lithuania, Poland and Russia and in our sales offices. In 2017, our net sales amounted to MEUR 411. Paroc is a part of Owens Corning.